Three-way valve.



J. I]. BENBOW & W. L. BURNER.

THREE-WAY VALVE.

APPLICATION man AUG-31,1915.

1,178.39, Patented Apr. 4,191.6.

m 3 l 6 l3 5/ l l: a l ,7 1 /4 W l3 I I 7a 7 .rAmns n. m'mnow nm L. BURNER, or COLUMBUS, OHIO, assronons TO THE K1IIIBOUBNE AND JACOBS MANUFACTURING COMPANY, OF COLUMBUS, OHIO, A COR- PORATION OF OHIO.-

To all Mam it may concern: 4

Be it a known that we, JAMES D. BEN-BOW and WILLIAM L. "BURNER, citizens of the United States, residing. at Columbus, in the count'yoffFranklin and State of Ohio, have invented certain-new, and useful ImprovementsinTh'ree-Wa' Valves, of which the following'is a-speci cation.

- Our invention'relates to improvementsin three way valves,-and includes especially the means for controlling the exhaust and outlet ports by; the construction and operation of a rotary valve, in conjunction with a recipro- Y eating/valve adapted to be opened by the 'In the drawings which "are hereto rotary valve, for. controlling the inlet port hereinafter described.

attached I i and herebymade a part of this specification,

Figure 1 shows the valve casing in horizon-- tal section and the rotary valve disposed there'in;lFig. 2 shows a transverse section through the valve and casing and the inlet valve; Fig. 3 shows the exhaust port closed as the valve is rotated to cause the inlet port to open; Fig. 4-shows. the intake position; Fig. 5 shows the exhaust position.

, providing for an earlier and more complete opening of the train pipe to exhaust, and a rolling or cam-like contact with the stem of the intake valve when the latter is operated by said segment 6. a

The inlet port 10 is controlled by the valve 11 which is seated through the in- 45 .'fluence of the spring 12 and is provided with the-stem 13 project1ng into the valve chamher into the path of rotaryva-lve 2. "Communication' between the valve chamber and the train line is provided through the port be employed with'the motive fluid air or v 14 and the exhaust takes place through the port 15. This valve construction may be insertedinto a service line as .desired and may steam, as desired.

The operation and functions of the valve construction are as follows :-The safety Tramway VALVE.

' Specification of Letters Patent. Apnlication flled August 31, 1915. Serial No. 48,228.

Patented Apr. 4, 1916.

position shown in 2 is attained by ro tatmg valve 2 to close the port 14, and thereupon segment 6 is moved out of contact with valve stem 13, whereupon valve 11 is seated by the spring 12; by this movement segment 7 1s brought into such position as to, leave the exhaust port partially Open, and any of the motive fluid which may leak in through the inlet valve 11 will constantly escape, whereby any harmful accumulation of the motive fluid in the valve chamber is avoided, and the operation of the valve rendered entirely saf The closed position shown in, Fig. 3 is attamed by the rotation of the valve 2 to cause segment 6 to openthe inlet valve 11, or the valve 2 may be left in the position shown in sand figure if desired. The position of parts therein shows that the exhaust port is entirely closed before the segment 6 is brought into contact with the, stem 13 ot' the valve 12 to open the latter and permit the airor steam to enter. As the valve is rotated the inlet port and the outlet port 14: are slmultaneously opened and the segment 7 has meanwhile been maintaim'n the closure of the port 15, as shown in Fig. 4. The exhaust position shown in Fig. 5 is attamed by rotating the valve 2 to bring segment 6 out of contact with valve stem 13 and permit spring 12 to seat the valve 11,

and to open the ports 14 and 15, whereupon the motive fluid confined in the train line is exhausted out through the port 15.

Valveponstructions are known which will accomplish the simultaneous opening of inlet and outlet ports, and the opening of the exhaust port at the same time as the closing of the inlet port; but no three-way valve construction is known to us which is capable of assuring the escape through the exhaust port of any leakage coming through i the inlet valve, or of providing for the posit1ve closure of the exhaust port just prior to the opening of the inlet'port; nor do we know any three-way valve construction which provides for rolling or cam-like contact between the rotary valve and the stem of the reciprocating valve, by which construction also the complete clearance of the outlet port is attained at an earlier point in the rotation of the rotary valve.

What we claim as new and desire to secure by Letters Patent is 1. In a chambered val e C ng Pro i ed with an inlet port, an outlet port, and an exhaust port, a spring actuated valve for closing said inlet port, a rotary valve cut away to provide two segments having a passageway therebetween through said valve, said rotary valve being adapted to be rotated to cause one of said segments to close said outlet port and to cause the other segment partially to close said exhaust port whereby any leakage through said closed inlet port may escape through said exhaust ort.

p 2. In a chambered valve casing provided with an inlet port, an outlet port, and an exhaust port, a spring actuated valve for closing said inlet port, a rotary valve adapt: ed to open said spring actuated valve cut away to provide two egments having a passageway therebetween through said valve, said rotary valve being adapted to be rotated to cause one of said segments to close said exhaust port and immediately thereafter to cause the other segment to open said spring actuated valve, whereby the positive closing one of its edges round for the double pur-.-

pose of permitting a rolling or cam-like contact thereof with said reciprocatin valve ing earlier complete opening of the outlet port whenthe exhaust takes 'place.

In witness whereof we have hereunto subscribed our names at Columbus, Ohio, on i this 23d day of August, 1915', in the pres ence of two witnesses. 7

JAMES D. BENBOW. WILLIAM L. BURNER. Witnesses:

J. N. MARKED, J. D.'PO'1'IER.

structure to open the latter, and of urnish- 

